Information Theory

Computation, Cryptography, and Network Security - download pdf or read online

By Nicholas J. Daras, Michael Th. Rassias (eds.)

ISBN-10: 3319182749

ISBN-13: 9783319182742

ISBN-10: 3319182757

ISBN-13: 9783319182759

Analysis, overview, and information administration are middle talents for operation learn analysts. This quantity addresses a couple of concerns and constructed tools for making improvements to these talents. it's an outgrowth of a convention held in April 2013 on the Hellenic army Academy, and brings jointly a large number of mathematical tools and theories with numerous functions. It discusses instructions and ambitions of scientists that pertain to engineering sciences. it's also offers the theoretical heritage required for algorithms and strategies utilized to a wide number of concrete difficulties. a couple of open questions in addition to new destiny parts also are highlighted.

This ebook will attract operations study analysts, engineers, neighborhood determination makers, teachers, the army neighborhood, practitioners sharing the present “state-of-the-art,” and analysts from coalition companions. subject matters lined contain Operations learn, video games and keep an eye on idea, Computational quantity idea and knowledge defense, clinical Computing and functions, Statistical Modeling and purposes, platforms of tracking and Spatial Analysis.

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Example text

Since then, others have attempted to extend this analysis across the diffusion phase, using either experimental or theoretical approaches. Biryukov et al. [17] used experimental data from a random sample of A5/1 states to estimate that the set of possible initial states contains only about 15 % of all possible 64-bit states. Alhamdan [1] performed an exhaustive experimental evaluation on a scaled-down version of the A5/1 stream cipher, and found similar proportions. Kiselev and Tokareva [36] used a theoretical approach to extend Golic’s results, but obtained results which conflict with those 30 A.

2, state convergence may leave a cipher vulnerable to distinguishing attacks, time-memory-data trade-off attacks and other ciphertextonly attacks. In fact, state convergence in A5/1 was one of the contributing factors in Biryukov, Shamir and Wagner’s practical time-memory attack on this cipher [17]. In addition, the presence of state convergence in A5/1 may reduce the search space for attacks such as the ciphertext-only attack we present in Sect. 4. Flaws in the Initialisation Process of Stream Ciphers 33 Table 3 Comparison between the analysis of inaccessible states No.

If the update functions for diffusion and keystream generation are similar, but not identical, then the keystream sequence obtained from the second key-IV pair may be a phase shifted version of the keystream sequence obtained from the first key-IV 26 A. Alhamdan et al. a Keystream generation Initialisation process K, IV z α z K, IV b Initialisation process Initialisation process Keystream Generator Keystream Generator Fig. 2 Slid pairs in stream ciphers. (a) Two slid pairs and shifted keystream.

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Computation, Cryptography, and Network Security by Nicholas J. Daras, Michael Th. Rassias (eds.)


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